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Heterothallic species have sexes that reside in different individuals. The term is applied particularly to distinguish heterothallic fungi , which require two compatible partners to produce sexual spores, from homothallic ones, which are capable of sexual reproduction from a single organism.
In yeast, heterothallic cells have mating types a and α. An experienced mother cell (one that has divided at least once) will switch mating type every cell division cycle because of the HO allele. Sexual reproduction commonly occurs in two fundamentally different ways in fungi.
In heterothallic species, sexual reproduction occurs when opposite mating types (designated + and -) come into close proximity, inducing the formation of specialized hyphae called gametangia. The gametangia grow toward each other, then fuse, forming a diploid zygote at the point of fusion.
Heterothallism is the most common mating system in Basidiomycota and in Agaricomycotina (the mushroom-forming fungi) about 90% of the species are heterothallic. [22] The tetrapolar type of mating system is ruled by two unlinked mating loci termed A and B (in Agaricomycotina) or b and a (in Ustilaginomycotina and Pucciniomycotina ), both of ...
The logic of psychological classifications development demanded a parallel existence of two scientific approaches: one of which was named "psychology of types", and the other—"psychology of traits". In the course of time, both approaches shifted towards each other: the psychology of types—in attempts to understand the structure of ...
In reproductive biology, heterogamy is the alternation of differently organized generations, applied to the alternation between parthenogenetic and a sexual generation. [1] [2] This type of heterogamy occurs for example in some aphids.
Morphological psychology is applied in clinical application of psychoanalysis and therapy, as well as more alternative applications like music therapy. Through the understanding of the motivational framework, which is individually developed since early childhood, a person's often conflicting motivations can be revealed and analysed.
A review subsequently published also does not show women changing the type of men they desire at different times in their fertility cycle. [5] Another study found no correlation between current fertility status and sociosexual attitudes and desires.